Carbureter.



F. GREINER.

CARBURETER.

APPLICATION F ILED MAY 15. 1913- PatentedSept. 14, 1915.

4 SHEETS-SHEET 2.

FLGREINER. CABBURETER. APPLICATION FILED MAY 15. 1 913- I. I I I l PatentedSept-V. 14, 1915'.

F. GREINER.

CARBURETER.

APPLICATION FILED MAY 15. I913.

I 1453 4811 Pat-entedSept. 14,1915.

4 SHEETS-SHEET 4.

UNITED STATES PATENT OFFICE.

FRITZ GREINER, OF REINICK ENDOBF-OST, GERMANY, ASSIGNOR TO OTTO SCHLICK, OF BERLIN, GERMANY.

OARBURETER.

Specification of Letters Patent.

. Patented Sept. 14, 1915.

Application filed May 15, 1913. Serial No. 767,805.

i To all whom it may concern:

Be it known that I, FRrrz GREInER, of Reinick'endorf-Ost, Germany, a sub ect of the King'of Wurttemberg, and whose postofiice address is 84 Provinzstrasse, Reinickendorf-Ost, near Berlin, Kingdom of Prussia, German Empire, have invented a new and useful Carbureter for Internal-Combustion Engines, of which the following is a runs without load.

."A-n' important feature of the invention is the particular regulating mechanism for the auxiliary mixing device for the purpose of enabling the latter to perform both the functions referred to in an efiicient and as perfect a manner as possible.

A further feature of the invention concerns' the regulation of the additional air required in the transition from the slow running to high speeds or in other words from the idle running of the engine to its working under full load and during the regular working thereof.

Another feature of the invention consists in the possibility of exchanging the air and fuel nozzles in the case in which the carbureter is to be adapted for different fuels, for instance, motor spirit, benzin, heavy benzin or benzol, so" as to enable the driver to use one or the other medium without having to detach the carbureter.

A constructional form of the carbureter according to this invention is illustrated by way of example in the accompanying drawings, in which Figure 1 is a vertical longitudinal section of the carbureter on the line AA of Fig. 2. Fig. 2 is a horizontal cross section on the line BB of Fig. 1, with the float shown removed. Fig. 3 is a vertical longitudinal section on the line C--C of Fig. 1 and showing a View at right angles to the latter with the air nozzle and the fuel nozzle of the main mixer removed. Fig. 4 is a sectional view of a detail on the line DD of Fig. 3. Fig. 5 shows a similar section with the controlling member in a different position. Fig. 6 is a horizontal section of the valve casing on the line E-E of Fig. 3. Fig.7 shows the lid on the valve casing with the adjustable controlling slide for the admission of additional air, and Fig. 8 illustrates the ports in the slide for controlling the admission of the additional air in diflerent posit1ons and on a somewhat enlarged scale.

The earbureter comprises a housing 1 (Figs. 1, 2 and 3), connected at its lower part to the cylindrical fuel container 2, which is cast integral with the housing and with the lateral air inlet chamber 3. The

fuel container is provided at its bottomjwith a socket 4 screwed into which is the connecting socket 5 for the fuel supply conduit. At the top, the fuel container 2 is closed by a lid 6 which is held inclosed position by a spring 7 or a like contrivance. The fuel inlet socket 5 forms in a known manner the seat for the stem 8 of an inlet valve which by means of pivoted levers 9 is held in contact with a float 10 adapted to maintain the fuel at a constant level in the usual known manner. Leading from the fuel container to a socket 12 on the air inlet chamber 3 is a passage 11 which is closed by a screw plug 13 and into which the fuel nozzle 14: can be screwed from below after removing the screw plug 13. The air inlet chamber 3 is provided laterally with an air inlet socket 15 and with a second'air inlet socket 16 of which the one may be closed in a known manner by a cover 17 equipped with a sliding register 18." Leading from the socket 12laterally to a Vertical bore 21 is a further passage 20. The bore 21 may be closed from below by a screw 22, after the removal of which a second small fuel nozzle 23 or nozzle of the auxiliary mixer may be screwed into the bore from below. This auxiliary nozzle is surrounded by a pipe 24 which is provided with a circular series of small holes 25. Arranged above the pipe 24 is a bore 26 traversed by a transverse pas sage 27, the outwardly leading portion of which is closed by a pointed screw 28 formpassage 27.

Adapted to be laterally inserted in the housing 1 is a prismatic central part or bushing 30 which is secured in position to the housing as is shown in Fig. 2 by two screws 31. Capable of being introduced into this bushing 30 isan air nozzle 32 provided with a top flange 33 fitted in a corres ending annular groove in the bushing 30.

he housing 1, as shown in Fig. 3, is provided with a lateral tubular projection or socket 35 having a cylindrical bore which is adapted to be closed by a screw plug 36. Inserted in the cylindrical bore is a cylindrical nipple 37 which has an eccentric bore 38 and on one of its faces a'groove 39 enabling after removal of the screw plug 36 a screwdriver or like tool to be introduced into the groove for the purpose ofrotating the nipple 37 and thereby adjusting the position of the eccentric passage 38, as indicated in Figs. 4 and 5. Inserted in the upper part of the tubular socket 35 is a short pipe 40 having air inlet openings 41 and being surrounded by a rotary sleeve 45 which is provided with similar openings 42.

The upper portion of the housing 1 is constructed to form a valve casing rotatably journaled in which on a shaft 52 is the distributing valve or throttle 51. As shown in Fig. 3 this'valve 51 is provided with a small opening 53 which in the position shown in.

Fig. 3 registers with the lateral passage,27. In the rotation of the valve 51 in the direction of the arrow shown in Fig. 3, the passage 27 is closed and atthe same time the path is freed for the mixture to pass through the nozzle 32 to the mixture feed pipe 54. This pipe is provided with a flange 55 for the usual connection to the valve casing of the engine. The rotation of the distributing valve 51 is effected by means of a lever 56 which is secured at the outside of the lid 60 to the shaft 52 of the.

throttle 51.. The lid 61 on the other side of this casin is provided with a stop pin 58, whereby t .e rotation of the valve to the position shown in Fig. 3 is suitably confined.

Arranged in the wall of the valve 51 and,

facing the lid 61' are openings 57, and rotatably mounted on the shaft 52 on the outside of the lid 61 is a slide 62 provided with an annular flange 63 which is adapted to overlap the edge of the valve casing 50. Provided in this edge are four openings 64, 65, 66 and 67, as shown in Fig. 6, of different diameters, and arranged in the flange 63 are four openings68, of equal and the same diameter as the opening 67. In the face portion of the slide 62 is a curved slot 69 projectingthrough which is aset screw 70 by means of which the slide can be secured in its adjusted position. Wire netting 71 is arranged to cover the openings 68 in the shde 62 externally, so as to prevent dust or other foreign bodies from entering the openings, and a similar but cylindrical wire netting 72' is arranged within the air inlet socket 40, as shown in Fig. 3.

The operation of this carbureter is as follcws:Before starting the engine the fuel admitted at 5 to the receptacle 2 under the influence of the float 10 and the needle valve 8 assumes the level indicated in Fi 1 and rises to a corresponding level in t e main fuel nozzle 14 close to its terminal. In the auxiliary mixer the fuel rises in the pipe as shown in Fig. 3 to a level which is above the terminal of the auxiliar fuel nozzle 23, because the upper edge 0 this nozzle 23 and the small holes 25 in the pipe 24 are situated slightly lower than the upper edge of the terminal of the fuel nozzle 14 in the main carbureter portion. By adjusting the rotary nipple 37 with its eccentric bore38, as indicated in Figs. 4 and 5, the cross section of the air passage above the fuel level may be suitably varied. In the position of the nipple 37, as shown in Figs. 3 and 4, in which the eccentric bore 38 is in its highest position the fuel lies relatively low in the eccentric opening and thus frees the substantially large opening for the passage of the air. In the lowest position of the eccentric passage 38, however, as shown in Fig. 5, the relation is reversed inasmuch as the fuel almost completely closes the air pascommunicates with the passage 27, while the passage from the air nozzle 32 to the feed socket 54 is entirely closed by the throttle. In this position of the valve the latter also closes the whole of the openin 64 to 67 arranged for the admission of t auxiliary air. In starting the engine air is sucked on by the cylinder through the ports 41, the eccentric passage 38, the small holes 25, the passages 26 and 277 through the opening 53 and carries with it into the mixture socket 54 and the valve casing the whole of the fuel located above the terminal of the nozzle 23 in the auxiliary mixer. For the first ignition, therefore, a mixture very rich in fuel issucked on and atomized by the nozzle 23 and the walls of the passa of this mixture are finely wetted with fuel,

- thus enabling the motor to start easily upon As soon as, after the-engine is "admission of auxiliary air. are consecutively freed so that when the distributing valve 51 is only slightly opened, first of all the smallest opening 64 is freed, whereas the whole of the openings 64 to 67 are uncovered when the valve 51 is opened to its full extent. In these positions of the valve the required explosive mixture is supplied in the known manner from the main mixer through the fuel nozzle 14 and the air nozzle 32. The quantity'of the air for the mixture may be adjusted in the main mixer by the slide 18 and for the auxiliary mixer by means of the slide 45 and in the same manner the quantity of the auxiliary air can be adjusted with the aid of the slide 62. Owing to the mutual location and sizes of the openings 64, 65, 66 and 67 on the one hand, and the openings 68 on the other hand, the auxiliary air can never be entir'ely cut off by the adjustment of the slide 62, for even in the closing position, as

shown in the bottom portion of Fig. 8, a smallcross sectional passage is always held open, thus insuring that auxiliary aircan.

always enter the mixture socket 54 through these openings and the openings 57 as soon as the valve 51 has freed the second sized. opening and in all the further opening positions of the valve. Upon the quantity of the additional air being adjusted by means of the slide 62 for a particular engine, the binding screw 7 O is tightened, whereby the slide is secured in its adjusted position.

If with the same engine it is desired to use a difierent fuel, for example, benzol, or kerosene, instead of benzin, the screws 31 are loosened and the bushing 30 is laterally withdrawn after previously'removing the sci-ew plug 13 and unscrewing the fuel nozzle 14 by means of the wrench-shaped head of the plug 13. From the bushing 30 thus withdrawn the air nozzle 32 employed for the working with benz'in is withdrawn in upward direction, and a somewhat wider nozzle suitable for benzol is inserted thereon from above, the edge 33 therein serving as a safeguard for its correct insertionf The bushing 30 with the new nozzle is then reinserted laterally and secured in position by the screws 31. In the place of the fuel nozzle 14 a somewhat enlarged fuel nozzle is then screwed in from below for the use of the heavier oil and the closing plug 13 is refitted. By this simple manipulation. the a cases, even if benzol, kerosene, parafiin or other fuel is used.

What I do claim as my invention, and desire to secure by Letters Patent of the United States, is

1. In a carbureter the combination with a main mixing device of an auxiliary mixing device and controlling means for the said auxiliary mixing device comprising an ad justable rotary member provided with an eccentric passage and means for adjusting said member so as to vary the level of fuel in the said eccentric passage through which the air is drawn to form the mixture, substantially as set forth.

2. In a carbureter the combination with a main fuel nozzle and an air nozzle of an auxiliary mixing device comprising an auxiliary fuel nozzle located at a lower level with regard to the said main fuel nozzle, an auxiliary mixture conduit, ports, in the said iliary fuel nozzle, substantiitlly as set forth.

If i s? 3. In a carbureter the combination with a 1 main mixmg device of an auxiliary mixing device, a distributing valve arranged in the main mixture conduit, a casing for the said valve connected with both the main and the auxiliary mixture conduits, a series of air ports of different diameters in the casing, a slide adjustably mounted on the said casing, and provided with a corresponding number of air inlets but of equal diameten; adapted to register with the said air por' 5 so that a certain amount of auxiliary air/ is always admitted to the said casing, substantially as set forth.

4. In a'carbureter the combination with a main fuel nozzle of a main air inlet nozzle and a removable bushing slidable trans versely into and out of position in the main air duct and means for securing the said inlet nozzle in the said bushing and means for securing the said bushing in the said air duct, substantially as set forth.

5. In a carbureter the combination with a main fuel nozzle of a main air inlet nozzle and a removable bushing slidabletrans versely into and out of position in the main air duct, an annular fian e on the said air adapted to receive and to seat the air inlet nozzle, a detachable auxiliary fuel inlet nozzle and a distributing valve arranged to control simultaneously the main and the auxiliary mixture conduit with means for controlhng the admission of auxiliary air, all substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witv FRITZ GREINER. Witnesses HENRY HAsrEn, Wonnmum Ham. 

